Rockbridge, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.3 °C (low) to 17.3 °C (high). Annual precipitation averages 1076 Millimeters. Rockbridge is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.4 °C | 3.4 °C | 84.07 mm |
| February | -5.6 °C | 5.2 °C | 69.6 mm |
| March | -1.4 °C | 10.7 °C | 92.96 mm |
| April | 4.3 °C | 18 °C | 101.09 mm |
| May | 10.2 °C | 23 °C | 105.41 mm |
| June | 15.2 °C | 27.5 °C | 110.24 mm |
| July | 17.2 °C | 29.2 °C | 108.97 mm |
| August | 16.1 °C | 28.7 °C | 93.22 mm |
| September | 11.8 °C | 25.5 °C | 80.52 mm |
| October | 5.3 °C | 18.9 °C | 74.42 mm |
| November | 0 °C | 11.8 °C | 74.42 mm |
| December | -3.5 °C | 5.8 °C | 81.03 mm |
| Annual | 5.3 °C | 17.3 °C | 1075.95 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |